Mac or PC for Post Production Processing?

Time for another Debate Reader Question:

Is your primary photo processing computer a PC or a Mac?

I am regularly asked by Digital Photography School readers what kind of computer is best for post production photo processing…

so I thought it might be fun (and helpful) to turn the question over to you, the wider DPS community.

So what do you use and why?

Update: Thanks for the responses so far. A number of people have commented already that it doesn’t matter whether it is a Mac or PC and that it is more to do with the software being used. I agree with this – but we’ve already asked readers for their post production software preferences and this survey is more one we’re conducting out of interest in what computer you’re using to run it.